Wiring for ponds

[gaz26]

Hi all. Just been to a house and some cowboy electrican had fed the pond unit which controls the pump,filter and 4 lights with a 1.0mm twin and earth cable coming off the ring main. I told the landlord he needs to get this sorted and he asked me to do it for him. There is no space left in the consumer unit so i was just wondering is it ok to spur down off the ring main, then cable back entry through the wall to a outdoor enclosure consisting of a RCD , the a 1.5 SWA cable from there to the pond unit.
I'm guessing a 1.5 mm cable is suffficent with a 5 amp rcd. Does anyone know any different?

Thanks in advance.

 

[davelerave]

not too familiar

i'd prob be thinking 2.5 with an extra core -in case the lights are controlled separately by photocell

 

[Sav]

Gaz,
How about spur of the ring main as you mention, into a switched fused RCD spur (with a 5amp fuse). And then flex out from the spur into a wago adaptable box through the wall.
From there you can make off your 1.5 swa in the box ( wago do kits for this ) and down to the pond unit.
Hope this helps,
Sav

 

[davelerave]

1.5 is prob plenty btw

i just tend to use 2.5

 

[pushrod]

What type of CU is it?

 

[gaz26]

Its the old type cu with the rewireable fuses. Prob needs an upgrade but i dont think the tennant will go for that yet.

Thanks about the wago advice , i'll check those out

 

[robsparky1975]

Some cowboy electrician?,i take it you mean someone who was not by any means a qualified electrician,just someone posing as one,wonder if its the same chap who charged £950 for a shower cable install,anyway,is the exisiting main earthing and bonding arrangement sufficient?.this would be a part p notify job so may take a bit longer than expected

 

[gaz26]

its a tn-s system and everything seems to be good regarding the earthing. Its due for a periodic inspection soon anyway

I think it would be cheaper to use a weatherproof cu which comes with a rcd in it . Theyre about £20
The switched rcd spurs alone are about £40 and then i need a wago box or something like it.

So no-one see's any problem with coming off the ring then?

 

[rodney12]

as long as it's fused down then no problem imo